[PATCH] D127379: [Lex] Keep track of skipped preprocessor blocks and advance the lexer directly if they are revisited

[Argyrios Kyrtzidis via Phabricator via cfe-commits]

akyrtzi updated this revision to Diff 436612.
akyrtzi added a comment.

Add more comments about the use of `SkippingExcludedConditionalBlock` and move the new `Preprocessor` fields towards the top of the class.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D127379/new/

https://reviews.llvm.org/D127379

Files:
  clang/include/clang/Lex/Preprocessor.h
  clang/lib/Lex/PPDirectives.cpp

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